1/2 a^{v1,v2}_{a1,v0} b^{a0,a3}_{c0,a2} c^{a4}_{c1} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(c1) a+(v0) a-(v2) a-(v1) a-(a0)
+1/2 a^{v1,v2}_{a1,v0} b^{a0,a3}_{c0,a2} c^{a4}_{c1} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a+(v0) a-(v2) a-(v1) a-(a0)
+1/4 a^{v1,v2}_{a1,v0} b^{a3,a4}_{c0,a2} c^{a0}_{c1} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a+(v0) a-(v2) a-(v1) a-(a0)